Fresh chlorophyllous solution was leached by aether solution from bamboo leaves powder.A kind of derivant chlorophyll cupric acid was obtained by saponified,extracted;acidified and Cu metathesized from pasty chlorophyllous solution which was concentrated from chlorophyllous solution.Then water soluble odium copper chlorophyllin was prepared by purified chlorophyll cupric acid and NaOH.The spectrum showed that the preparation and determination were reasonable,experimental results were obviously.The odium copper chlorophyllin and other products could be prepared.